Presser-roller for gang-saw mills



A. RODGERS.

PRLSSLL LoLLLL` FOR GANG SAW MILLS.

`Patented'181:1316..1882.

l v Inven'r L. L L *.2/W

'N. PETERS. Phon. er. wnhinglun. ILC.

(No Model.)

UNITED 4STATES PATENT OFFICE.

ALEXANDER noDeEns, orMUsKEGoN, MICHIGAN.

PRESSER-ROLLER FOR GANG-SAW MILLS.

SPECIFICATION forming part of Letters Application filed February 8,1882.

To all whom tt may concern Beit known that I, ALEXANDER Rene-nas, acitizen of the United States, residing at Muskegon, in the county ofMuskegon and State of Michigan, have invented certain new and useful`Improvements in Binder-Rollers for Gang-Saw Mills, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.`

This invention relates to an improvement in binder-rollers for gang-sawmills. The stocks or logs which are sawed in these mills are fre-Iquently so small that more than one can be saw-teeth with the log thatthelifting power ofthe saws is exerted. In order to accom'-` plish thisresult in a practical manner, l have devised the plan of connecting thetwo rollers with the opposite ends ol' an equilibrium or equalizing beamin such a manner that they may move in opposite directions vertically,thus allowing them to accommodate themselves automatically to variationsin the thickness ot the stocks passing under them.

Heretofore these binding-rollers have been `constructed either in asingle piece, requiring the stocks to beall brought to an eventhickness, or in two pieces, each having an inde- Vit may be. placed.

pendentvertical movement and requiring separate adjustment. An attempthas also been made to give an automatic adjustment to the I rollers byplacing them on a double-cranked axle; but this placed one of therollers at such i a distance from the saws that it was inoperative at atime when its services were most neededthat is, when the end of a stockwas passing through the saws. It has not therefore gone into extensiveuse.

By my improvement I have overcome the difculties above enumerated and amable to pass stocks of varying thickness through the gang promiscuouslyand without any special Patent No. 257,979, dated May 16, 1882.

(No model.)

attention to the adjustment of the separate rollers. i ln theaccompanying drawings, Figure l shows the rollers in the position theyoccupy while stocks of different thickness are passing under them. Fig.2 shows them arranged for a single stock or two of even thickness.. Fig.3 is an end view of the rollers and a por-tion ot one ot' the guides bywhich they are partially supported. i

The equaliZng-beam A is preferably of cast- -iron, and formed, as shown,withv arc-shaped ratcheted ends A', which enter longitudinal grooves ain the guides B B. Mortises in these guides contain pawls U, which areprovided with weighted handles, so that when they are thrown back thepawls will be held out of engagement with the ratchet-teeth on the endsof the beam VA, but when turned in the opposite direction will engagewith said teeth and hold the beam rigidlyin any position in which D Darethe roller-frames, each ofwhichis pivoted to the equaliZing-beam by apin', b, which Vpasses through a centrally-located hole in the upperpart ot' the frame and one of a series of j holes `(shown 'in dottedlines) in the beam. This series ot' holes in the beam is intended toallow a lateral adjustment of the rollers and their frames upon thebeam, as when a single stock is passing through they need to be closertogether than when two are operated upon at the same time.

The rollers E E are journaled in theframes D D and revolve freelytherein. When it is desired to use the binder upon asingle stock or twoof even thickness the beam is brought into a horizontal position and thepins c c inserted through holes in the roller-frames near their innerends. These pins pass beneath the carried by a system of levers, or anyother of the many well-known mechanical devices 1n use for raising andlowering Weights may be l employed, the selection being governed bythe 5judgment of the artisan who constructs the apparatus.

The operation ofthe device is simple. When two stocks of dilerentthicknesses are ready to enter the gangthe equilibrium-beam islowered.The roll upon one side rst comes in contact with the thickest stock, butas the beam is lowered it turns upon its suspension-pivot until theother roller comes in contact with the thinnest stock, when both rollswill rest with even pressure upon their respective stocks; and asthestockspass through the gang, should the thickness of either vary, therollers will readily adjust themselves automatically to the change,retaining all the while an equable pressure upon both stocks, and whenrunning single stocks or double stocks of even thick-v ness the whole isreadily converted in effect to a single rigid roll, bearing equallyacross the upper surface ot' the stock or stocks.

Having thus described my invention, I claim as new, and desire to securehy Let-ters Patent, the following:

1. As an improvement in binder-rollers for gang-saw mills, thecombination, with two separate rollers and their adjustable fra-mes, ofa swinging equalizing-beam and vertical guides for the ends of the same,all arranged substantially as and for the purpose speced.

2. In binder-rollers for gang-saw mills, the combination, with anequalizing-beam provided with ratcheted ends, 0f grooved guides havingpawls for sustaining said beam in a stationary position when desired andadjustable roller-frames attached to said beam, substantially as and forthe purpose' described.

3. The combination of the equalizing-beam, the roller-trames and rollerspivoted thereto, with the pins c, for the purpose of converting saidrollers and roller-frames from swinging attachments to said bar to rigidxture thereto, substantially as and for the purpose described.

In testimony whereof I afx my signature in presence ot' two witnesses.

Roer. E. BUNKER, H. L. DELANO.

